World Rabbit Science - Vol. 21 (1)-2013
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- A meta-analysis on the role of soluble fibre in diets for growing rabbits
- Effect of a diet containing white lupin hulls (Lupinus albus cv. Amiga) on total tract apparent digestibility of nutrients and growth performance of rabbits
- Meat quality of rabbits reared with two different feeding strategies: with or without fresh alfalfa ad libitum
- Pomegranate peel as a natural antioxidant boosts bucks' fertility under Egyptian summer conditions
- Technical Note: Effect of handling on stress-induced hyperthermia in adult rabbits
- Short communication: Influence of vitamins C and E on sperm motility of rabbit bucks
- Abstracts of the "XXXVII Symposium de Cunicultura de ASESCU". Barbastro (Spain) 24-25th of May 2012.
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- PublicationAbstracts of the "XXXVII Symposium de Cunicultura de ASESCU". Barbastro (Spain) 24-25th of May 2012(Editorial Universitat Politècnica de València, 2013-03-25) World Rabbit Science[EN] The annual Congress of the Spanish Association of Cuniculture (ASESCU) was held in Barbastro (province of Huesca, autonomous community of Aragón) on 24-25th May of 2012. The 37th edition was mainly devoted to analyse the present situation of the rabbit sector, as well as some new aspects in relation to diseases of the rabbit. It was presented an overview of the situation of the rabbit farming in Aragón, a commercial analysis of the rabbit farming sector in Spain, a main paper on the role of rural development as a complement to rabbit farming, and an analysis of the production cost of rabbit meat. Main papers related to parasite control and mixomatosis were also presented in 2 different conferences. Moreover 2 round tables were held on a new variant of rabbit haemorrhagic disease virus and a Sectorial Plan for the Spanish rabbit sector, respectively. Furthermore, a total of 18 communications were presented both in working sessions of oral communications and posters. Nutrition session analysed the influence of fibre type on its digestibility, the characterisation of intestinal microbiota in rabbits after weaning, the utilisation of distillers dried grains with solubles as well as of beet pulp in diets for fattening rabbits, the effect of dietary restrictions on the growth of fattening rabbits, and the effect of a prebiotic, a probiotic or a symbiotic in diets for fattening rabbits. Technico-economic management session studied the evolution of technical results of the Spanish farms during 2008-2011, as well as technical and economical implications of reproductive rhythms and weaning age for the profitability of farms. Genetics session evaluated the effect of divergent selection for residual variance of litter size on the embryo development. Ethology session analysed sex influence in rabbit mutual olfactory relationships. Reproduction session studied prediction of body fat deposits from perirenal fat measurements using ultrasound. Meat quality session analysed the effect of a supplementation with vegetable DHA on the growing and fattening performances and meat quality of the rabbit. Pathology section studied the effect of selection for reproduction or longevity on blood lymphocyte populations of does under conventional and heat stress conditions, the origin of staphylococcosis in rabbits, the epidemiology of staphylococcosis, pasteurellosis and bordetellosis in Portugal, and several works related to a new variant of rabbit haemorrhagic disease virus.
- PublicationShort communication: Influence of vitamins C and E on sperm motility of rabbit bucks(Editorial Universitat Politècnica de València, 2013-03-25) Najjar Ben Maâtoug, Amel; Ben Saïd, S.; Najjar, T.; Kalamoun, S.; Ben Khalifa, N.; Ben Aïchae, E.; Ben Mrad, M.[EN] The objective of the study is to investigate the effect of vitamin C and E supplementation on rabbit sperm motility. Forty INAT breed bucks aged 8.5 mo were divided into 2 groups: control group (C) and treated group (T) receiving vitamins C (1 g/L) and E (1 g/L) incorporated in the drinking water. Semen was collected using an artificial vagina over 6 wk (C, total ejaculates=81; T, total ejaculates=76). The massal motility (MM) was evaluated in the fresh and raw semen. Then, the individual motility at 0 (IM0), 2 (IM2) and 4 h (IM4) after semen collection was determined in diluted semen and conserved at +4°C for the 2 groups. MM was higher in T than in C group (P=0.0012). However, the individual motilities IM0, IM2 and IM4 did not vary between the 2 groups. In conclusion, the supplementation of vitamins C and E in the drinking water for rabbit influenced only the MM in both fresh and raw semen.
- PublicationTechnical Note: Effect of handling on stress-induced hyperthermia in adult rabbits(Editorial Universitat Politècnica de València, 2013-03-25) Olivas, Irene; Villagrá, Arantxa[EN] Animals perceive humans as a threat, therefore handling could cause stress reactions and fear in rabbits. Stress induced hyperthermia (SIH) is a physiological response produced when a stressful situation takes place and is supposed to occur in rabbits. In this work, the SIH response is assessed when different groups of rabbits (young males, nulliparous does and multiparous does) are handled. A benzodiazepine (Midazolam¿) was administered to half of the animals to assess handling response also under drug effects. Rectal temperature was not increased by handling in male rabbits and multiparous does, whereas nulliparous females showed presented SIH after 30 min of handling. In addition, Midazolam¿ has been revealed as useful for pharmacological validation of SIH after 25 min from injection.
- PublicationPomegranate peel as a natural antioxidant boosts bucks' fertility under Egyptian summer conditions(Editorial Universitat Politècnica de València, 2013-03-25) Zeweil, Hassan S.; Elnagar, Samar; Zahran, Soliman M.; Ahmed, Mohamed H.; El-Gindy, Yassmine[EN] Exposure of male rabbits to heat stress during summer adversely affects their fertility, leading to major production losses. A total of 16 male rabbits were randomly divided into 4 experimental groups exposed to temperatures ranging from a high of 30.3 to a low of 27.3 °C. Animals from first to fourth groups were fed diets containing 0, 1.5, 3.0, or 4.5% pomegranate peel (PP) to evaluate the ability of PP feeding to enhance bucks¿ reproductive status. Pomegranate peel treatments significantly increased ejaculate volume by 19, 18 and 12%, increased seminal plasma fructose by 7, 18, and 24%, improved sperm motility by 28, 34 and 49%, increased sperm total output by 37, 69 and 102% and reduced dead sperm by 24, 32 and 64% with diets containing 1.5, 3.0 and 4.5% of PP compared to the heat stressed control animals. Seminal plasma total lipids, cholesterol and triglycerides increased while alkaline phosphatase decreased with PP treatments. Seminal plasma total antioxidant capacity increased to reach 126, 143 and 191% with diets containing 1.5, 3.0 and 4.5% of PP, while lipid peroxide (malondialdehyde) levels decreased significantly to reach around 54% of the heat stressed bucks¿ value with the three PP dietary doses used. It was concluded that supplementations of PP in the diet of bucks during summer season in Egypt can improve their semen characteristics, probably due to their antioxidant actions.
- PublicationMeat quality of rabbits reared with two different feeding strategies: with or without fresh alfalfa ad libitum(Editorial Universitat Politècnica de València, 2013-03-25) Capra, Gustavo; Martínez, Rosana; Fradiletti, Florenca; Cozzano, Sonia; Repiso, Luis; Márquez, Rosa; Ibáñez, Facundo[EN] The aim of this study was to evaluate production performance, carcass characteristics and nutritive value of meat of rabbits reared under the 2 prevailing feeding strategies in Uruguay. One week after weaning, 96 purebred V line rabbits were randomly distributed between 2 treatments: (T1) commercial pelleted food ad libitum and (T2) commercial pelleted food ad libitum plus fresh alfalfa ad libitum. Each treatment included 12 cages containing 4 individuals each (2 males and 2 females). Growth performance characteristics (live weight evolution, commercial food consumption and food/gain ratio) were evaluated. The consumption of alfalfa was not measured. Rabbits were slaughtered at a live weight of 2500 g and carcass characteristics were evaluated. Samples of meat and dissectible fat were analysed to determine intramuscular fat content at muscle L. dorsi, dissectible fat and intramuscular fat composition, minerals (Zn, Fe, Mg and Na), vitamin E and purines. Sensory evaluations were conducted to assess the effect of treatments on the consumer¿s perception of differences and the existence of attributes determining preferences. Differences between treatments were significant for total commercial food intake (23 356 vs. 20 930 g/cage; P<0.001) and feed conversion ratio (3.82 vs. 3.41; P<0.01) for T1 and T2 respectively. No significant differences were found in average daily gain, age at slaughter and carcass characteristics. There were no significant differences in the intramuscular fat content. The fatty acid composition of dissectible and intramuscular fat was affected the inclusion of alfalfa in the diet increasing the linolenic acid content (1.82 vs. 3.28% and 2.29 vs. 5.15% for T1 and T2 at intramuscular and dissectible fat, respectively; P<0.001), and improving the n-6/n-3 relationship (8.60 vs. 5.82 and 11.58 vs. 5.64 for T1 and T2 at intramuscular and dissectible fat, respectively; P<0.001). There were no significant differences in vitamin E, Fe or Zn content between treatments, but in Mg (22.5 vs. 24.4 mg/100 g for T1 and T2; P<0.05) and Na (44.1 vs. 48.2 mg/100 g; P<0.05). In the sensory evaluation, panellists significantly perceived differences between treatments with 95% confidence.